/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:31:56,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:31:56,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:31:56,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:31:56,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:31:56,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:31:56,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:31:56,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:31:56,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:31:56,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:31:56,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:31:56,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:31:56,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:31:56,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:31:56,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:31:56,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:31:56,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:31:56,925 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 02:31:56,945 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:31:56,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:31:56,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:31:56,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:31:56,947 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:31:56,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:31:56,947 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:31:56,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:31:56,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:31:56,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:31:56,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:31:56,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:31:56,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:31:56,949 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:31:56,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:31:56,949 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:31:56,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:31:56,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:31:56,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:31:56,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:31:56,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:31:56,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:31:56,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:31:56,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:31:56,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:31:56,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:31:56,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:31:56,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:31:56,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:31:57,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:31:57,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:31:57,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:31:57,249 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:31:57,249 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:31:57,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c [2021-05-06 02:31:57,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd945057e/81d3833f248f4a8ba209999ff65bec01/FLAG65cd1c484 [2021-05-06 02:31:57,809 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:31:57,810 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c [2021-05-06 02:31:57,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd945057e/81d3833f248f4a8ba209999ff65bec01/FLAG65cd1c484 [2021-05-06 02:31:58,171 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd945057e/81d3833f248f4a8ba209999ff65bec01 [2021-05-06 02:31:58,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:31:58,178 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:31:58,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:31:58,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:31:58,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:31:58,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:31:58" (1/1) ... [2021-05-06 02:31:58,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d0566ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:58, skipping insertion in model container [2021-05-06 02:31:58,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:31:58" (1/1) ... [2021-05-06 02:31:58,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:31:58,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:31:58,315 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c[490,503] [2021-05-06 02:31:58,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:31:58,354 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:31:58,406 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c[490,503] [2021-05-06 02:31:58,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:31:58,428 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:31:58,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:58 WrapperNode [2021-05-06 02:31:58,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:31:58,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:31:58,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:31:58,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:31:58,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:58" (1/1) ... [2021-05-06 02:31:58,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:58" (1/1) ... [2021-05-06 02:31:58,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:58" (1/1) ... [2021-05-06 02:31:58,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:58" (1/1) ... [2021-05-06 02:31:58,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:58" (1/1) ... [2021-05-06 02:31:58,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:58" (1/1) ... [2021-05-06 02:31:58,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:58" (1/1) ... [2021-05-06 02:31:58,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:31:58,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:31:58,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:31:58,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:31:58,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:31:58,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:31:58,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:31:58,530 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:31:58,530 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:31:58,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:31:58,530 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:31:58,530 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:31:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:31:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:31:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:31:58,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:31:58,532 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:31:58,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:31:58,532 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:31:58,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:31:58,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:31:58,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:31:58,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:31:58,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:31:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:31:58,901 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:31:58,902 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 02:31:58,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:31:58 BoogieIcfgContainer [2021-05-06 02:31:58,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:31:58,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:31:58,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:31:58,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:31:58,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:31:58" (1/3) ... [2021-05-06 02:31:58,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f46a1f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:31:58, skipping insertion in model container [2021-05-06 02:31:58,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:58" (2/3) ... [2021-05-06 02:31:58,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f46a1f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:31:58, skipping insertion in model container [2021-05-06 02:31:58,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:31:58" (3/3) ... [2021-05-06 02:31:58,918 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound1.c [2021-05-06 02:31:58,923 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:31:58,926 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:31:58,941 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:31:58,976 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:31:58,977 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:31:58,977 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:31:58,977 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:31:58,977 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:31:58,977 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:31:58,977 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:31:58,977 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:31:58,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 02:31:59,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 02:31:59,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:59,001 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:59,002 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:59,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:59,008 INFO L82 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2021-05-06 02:31:59,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:59,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544954366] [2021-05-06 02:31:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:59,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:31:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:59,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:31:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:59,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:31:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:59,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:31:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:59,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:31:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:59,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-06 02:31:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:59,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-06 02:31:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 02:31:59,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:59,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544954366] [2021-05-06 02:31:59,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544954366] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:31:59,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:31:59,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:31:59,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792922693] [2021-05-06 02:31:59,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:31:59,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:59,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:31:59,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:31:59,394 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:31:59,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:59,627 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2021-05-06 02:31:59,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:31:59,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-06 02:31:59,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:59,636 INFO L225 Difference]: With dead ends: 73 [2021-05-06 02:31:59,636 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:31:59,639 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:31:59,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:31:59,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 02:31:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 02:31:59,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-06 02:31:59,679 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-06 02:31:59,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:59,680 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-06 02:31:59,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:31:59,680 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-06 02:31:59,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 02:31:59,682 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:59,682 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:59,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:31:59,682 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:59,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:59,683 INFO L82 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2021-05-06 02:31:59,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:59,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576231928] [2021-05-06 02:31:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:59,715 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:59,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770001392] [2021-05-06 02:31:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:59,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:31:59,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:59,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 02:32:00,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:00,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576231928] [2021-05-06 02:32:00,070 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:00,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770001392] [2021-05-06 02:32:00,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770001392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:00,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:00,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:32:00,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270706511] [2021-05-06 02:32:00,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:32:00,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:00,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:32:00,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:32:00,073 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:32:00,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:00,309 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-05-06 02:32:00,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:32:00,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-05-06 02:32:00,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:00,314 INFO L225 Difference]: With dead ends: 52 [2021-05-06 02:32:00,314 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 02:32:00,315 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:32:00,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 02:32:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 02:32:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 02:32:00,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 02:32:00,331 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-06 02:32:00,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:00,331 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 02:32:00,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:32:00,332 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 02:32:00,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 02:32:00,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:00,333 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:00,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:32:00,541 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:00,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:00,542 INFO L82 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2021-05-06 02:32:00,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:00,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166697341] [2021-05-06 02:32:00,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:00,565 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:00,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101703060] [2021-05-06 02:32:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:00,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:32:00,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:00,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 02:32:00,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:00,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166697341] [2021-05-06 02:32:00,891 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:00,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101703060] [2021-05-06 02:32:00,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101703060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:00,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:00,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:32:00,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995758474] [2021-05-06 02:32:00,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:32:00,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:00,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:32:00,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:32:00,897 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:32:01,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:01,110 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2021-05-06 02:32:01,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:32:01,110 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2021-05-06 02:32:01,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:01,113 INFO L225 Difference]: With dead ends: 57 [2021-05-06 02:32:01,113 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 02:32:01,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:32:01,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 02:32:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-06 02:32:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 02:32:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-06 02:32:01,138 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-06 02:32:01,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:01,138 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-06 02:32:01,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:32:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-06 02:32:01,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 02:32:01,140 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:01,140 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:01,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:01,365 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:01,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:01,366 INFO L82 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2021-05-06 02:32:01,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:01,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133199993] [2021-05-06 02:32:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:01,380 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:01,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510375822] [2021-05-06 02:32:01,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:01,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:32:01,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:01,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 02:32:01,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:01,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133199993] [2021-05-06 02:32:01,735 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:01,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510375822] [2021-05-06 02:32:01,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510375822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:01,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:01,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:32:01,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680546722] [2021-05-06 02:32:01,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:32:01,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:01,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:32:01,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:32:01,737 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-06 02:32:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:01,891 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-05-06 02:32:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:32:01,891 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 50 [2021-05-06 02:32:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:01,894 INFO L225 Difference]: With dead ends: 56 [2021-05-06 02:32:01,895 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 02:32:01,895 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:32:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 02:32:01,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 02:32:01,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:32:01,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-06 02:32:01,905 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-06 02:32:01,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:01,906 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-06 02:32:01,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-06 02:32:01,906 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-06 02:32:01,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 02:32:01,907 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:01,907 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:02,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:02,133 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:02,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:02,133 INFO L82 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2021-05-06 02:32:02,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:02,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160288972] [2021-05-06 02:32:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:02,146 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:02,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15546153] [2021-05-06 02:32:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:02,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:32:02,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:02,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 02:32:02,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:02,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160288972] [2021-05-06 02:32:02,393 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:02,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15546153] [2021-05-06 02:32:02,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15546153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:02,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:02,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:32:02,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63946970] [2021-05-06 02:32:02,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:32:02,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:02,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:32:02,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:32:02,395 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:32:02,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:02,541 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-05-06 02:32:02,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:32:02,541 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2021-05-06 02:32:02,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:02,542 INFO L225 Difference]: With dead ends: 60 [2021-05-06 02:32:02,542 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 02:32:02,543 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:32:02,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 02:32:02,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 02:32:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:32:02,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-06 02:32:02,553 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-06 02:32:02,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:02,553 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-06 02:32:02,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:32:02,554 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-06 02:32:02,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 02:32:02,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:02,555 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:02,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:02,769 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:02,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:02,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2021-05-06 02:32:02,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:02,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125132877] [2021-05-06 02:32:02,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:02,783 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:02,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364664014] [2021-05-06 02:32:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:02,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 02:32:02,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:02,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-05-06 02:32:03,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:03,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125132877] [2021-05-06 02:32:03,123 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:03,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364664014] [2021-05-06 02:32:03,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364664014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:03,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:03,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:32:03,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921405510] [2021-05-06 02:32:03,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:32:03,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:03,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:32:03,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:32:03,125 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:32:03,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:03,342 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-05-06 02:32:03,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:32:03,343 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 60 [2021-05-06 02:32:03,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:03,344 INFO L225 Difference]: With dead ends: 66 [2021-05-06 02:32:03,344 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 02:32:03,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:32:03,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 02:32:03,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-05-06 02:32:03,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:32:03,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-06 02:32:03,355 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-06 02:32:03,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:03,356 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-06 02:32:03,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:32:03,356 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-06 02:32:03,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 02:32:03,357 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:03,357 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:03,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:32:03,581 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:03,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:03,581 INFO L82 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2021-05-06 02:32:03,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:03,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543875075] [2021-05-06 02:32:03,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:03,591 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:03,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496208109] [2021-05-06 02:32:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:03,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:32:03,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:03,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 02:32:03,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:03,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543875075] [2021-05-06 02:32:03,916 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:03,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496208109] [2021-05-06 02:32:03,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496208109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:03,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:03,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:32:03,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418566098] [2021-05-06 02:32:03,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:32:03,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:03,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:32:03,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:32:03,919 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:32:04,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:04,155 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2021-05-06 02:32:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:32:04,156 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 67 [2021-05-06 02:32:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:04,158 INFO L225 Difference]: With dead ends: 80 [2021-05-06 02:32:04,158 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 02:32:04,159 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:32:04,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 02:32:04,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2021-05-06 02:32:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:32:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-05-06 02:32:04,182 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 67 [2021-05-06 02:32:04,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:04,184 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-05-06 02:32:04,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:32:04,185 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-05-06 02:32:04,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:32:04,188 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:04,188 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:04,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:04,405 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:04,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:04,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2021-05-06 02:32:04,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:04,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479410303] [2021-05-06 02:32:04,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:04,414 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:04,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128641833] [2021-05-06 02:32:04,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:04,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:32:04,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:04,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 02:32:04,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:04,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479410303] [2021-05-06 02:32:04,677 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:04,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128641833] [2021-05-06 02:32:04,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128641833] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:04,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:04,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:32:04,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967846845] [2021-05-06 02:32:04,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:32:04,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:04,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:32:04,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:32:04,679 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 02:32:04,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:04,817 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2021-05-06 02:32:04,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:32:04,818 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 69 [2021-05-06 02:32:04,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:04,819 INFO L225 Difference]: With dead ends: 89 [2021-05-06 02:32:04,819 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 02:32:04,820 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:32:04,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 02:32:04,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-06 02:32:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:32:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2021-05-06 02:32:04,832 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 69 [2021-05-06 02:32:04,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:04,833 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2021-05-06 02:32:04,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 02:32:04,833 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2021-05-06 02:32:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 02:32:04,834 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:04,834 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:05,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:05,050 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:05,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1507900548, now seen corresponding path program 2 times [2021-05-06 02:32:05,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:05,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053362220] [2021-05-06 02:32:05,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:05,062 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:05,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200326876] [2021-05-06 02:32:05,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:05,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:32:05,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:05,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:32:05,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:05,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-05-06 02:32:05,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:05,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053362220] [2021-05-06 02:32:05,406 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:05,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200326876] [2021-05-06 02:32:05,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200326876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:05,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:05,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:32:05,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441901185] [2021-05-06 02:32:05,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:32:05,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:05,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:32:05,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:32:05,408 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:32:05,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:05,579 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2021-05-06 02:32:05,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:32:05,580 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 89 [2021-05-06 02:32:05,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:05,581 INFO L225 Difference]: With dead ends: 105 [2021-05-06 02:32:05,581 INFO L226 Difference]: Without dead ends: 70 [2021-05-06 02:32:05,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:32:05,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-06 02:32:05,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-06 02:32:05,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 02:32:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2021-05-06 02:32:05,593 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 89 [2021-05-06 02:32:05,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:05,594 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2021-05-06 02:32:05,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:32:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2021-05-06 02:32:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 02:32:05,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:05,595 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:05,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:32:05,805 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:05,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:05,806 INFO L82 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2021-05-06 02:32:05,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:05,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876426031] [2021-05-06 02:32:05,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:05,820 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:05,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943955996] [2021-05-06 02:32:05,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:05,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 02:32:05,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:05,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 02:32:06,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:06,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876426031] [2021-05-06 02:32:06,336 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:06,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943955996] [2021-05-06 02:32:06,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943955996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:06,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:06,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:32:06,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373274114] [2021-05-06 02:32:06,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:32:06,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:06,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:32:06,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:32:06,340 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:32:06,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:06,721 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2021-05-06 02:32:06,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:32:06,722 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2021-05-06 02:32:06,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:06,723 INFO L225 Difference]: With dead ends: 87 [2021-05-06 02:32:06,723 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 02:32:06,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 246.1ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:32:06,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 02:32:06,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2021-05-06 02:32:06,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 46 states have internal predecessors, (48), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:32:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2021-05-06 02:32:06,735 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 91 [2021-05-06 02:32:06,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:06,735 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2021-05-06 02:32:06,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:32:06,736 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2021-05-06 02:32:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 02:32:06,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:06,736 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:06,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:06,961 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:06,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:06,962 INFO L82 PathProgramCache]: Analyzing trace with hash 197559527, now seen corresponding path program 1 times [2021-05-06 02:32:06,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:06,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300147648] [2021-05-06 02:32:06,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:06,972 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:06,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646779167] [2021-05-06 02:32:06,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:07,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:32:07,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:07,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 02:32:07,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:07,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300147648] [2021-05-06 02:32:07,312 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:07,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646779167] [2021-05-06 02:32:07,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646779167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:07,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:07,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:32:07,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200666389] [2021-05-06 02:32:07,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:32:07,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:07,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:32:07,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:32:07,315 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:32:07,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:07,512 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2021-05-06 02:32:07,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:32:07,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 92 [2021-05-06 02:32:07,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:07,516 INFO L225 Difference]: With dead ends: 84 [2021-05-06 02:32:07,516 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 02:32:07,517 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:32:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 02:32:07,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 02:32:07,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 38 states have (on average 1.0) internal successors, (38), 38 states have internal predecessors, (38), 18 states have call successors, (18), 10 states have call predecessors, (18), 8 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 02:32:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-05-06 02:32:07,527 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 92 [2021-05-06 02:32:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:07,527 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-05-06 02:32:07,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:32:07,527 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-05-06 02:32:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 02:32:07,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:07,528 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:07,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:07,743 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:07,744 INFO L82 PathProgramCache]: Analyzing trace with hash -2082914122, now seen corresponding path program 1 times [2021-05-06 02:32:07,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:07,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528825343] [2021-05-06 02:32:07,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:07,763 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:07,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934631664] [2021-05-06 02:32:07,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:07,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 02:32:07,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:07,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 41 proven. 33 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-05-06 02:32:08,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:08,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528825343] [2021-05-06 02:32:08,294 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:08,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934631664] [2021-05-06 02:32:08,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934631664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:08,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:08,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 02:32:08,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252763937] [2021-05-06 02:32:08,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 02:32:08,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:08,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 02:32:08,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:32:08,296 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 02:32:08,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:08,702 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-05-06 02:32:08,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:32:08,702 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 96 [2021-05-06 02:32:08,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:08,704 INFO L225 Difference]: With dead ends: 65 [2021-05-06 02:32:08,704 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 02:32:08,707 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-05-06 02:32:08,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 02:32:08,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 02:32:08,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 02:32:08,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 02:32:08,708 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 96 [2021-05-06 02:32:08,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:08,708 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 02:32:08,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 02:32:08,708 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 02:32:08,709 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 02:32:08,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:32:08,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 02:32:09,514 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 34 [2021-05-06 02:32:09,781 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2021-05-06 02:32:10,116 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 34 [2021-05-06 02:32:10,420 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2021-05-06 02:32:10,774 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 45 [2021-05-06 02:32:10,971 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2021-05-06 02:32:10,978 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-06 02:32:10,978 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-06 02:32:10,978 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-06 02:32:10,978 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:32:10,979 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 02:32:10,979 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:32:10,979 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:32:10,979 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 02:32:10,979 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 02:32:10,979 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:32:10,979 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-06 02:32:10,979 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-06 02:32:10,979 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:32:10,979 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:32:10,979 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 main_~x~0) (<= 0 main_~y~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2021-05-06 02:32:10,979 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 74) no Hoare annotation was computed. [2021-05-06 02:32:10,979 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (= (* main_~y~0 main_~y~0) main_~yy~0)) (.cse1 (= main_~r~0 0)) (.cse3 (= main_~p~0 1)) (.cse4 (<= main_~b~0 main_~y~0)) (.cse5 (= main_~s~0 1)) (.cse6 (<= main_~y~0 1))) (or (let ((.cse2 (+ main_~b~0 main_~c~0))) (and .cse0 (<= main_~b~0 main_~x~0) .cse1 (<= main_~a~0 1) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (<= main_~x~0 .cse2) (= main_~k~0 1) (<= 0 main_~b~0) (not (= main_~b~0 0)) (<= .cse2 1) (<= 1 main_~a~0) .cse3 .cse4 .cse5 .cse6)) (and .cse0 (= main_~q~0 0) (<= 1 main_~x~0) (= main_~a~0 main_~x~0) (= main_~k~0 0) (<= 1 main_~b~0) .cse1 (= main_~c~0 main_~a~0) (<= main_~x~0 1) .cse3 .cse4 .cse5 .cse6))) [2021-05-06 02:32:10,980 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (= (* main_~y~0 main_~y~0) main_~yy~0)) (.cse1 (= main_~q~0 0)) (.cse2 (<= 1 main_~x~0)) (.cse3 (= main_~a~0 main_~x~0)) (.cse4 (<= 1 main_~b~0)) (.cse5 (= main_~r~0 0)) (.cse6 (= main_~p~0 1)) (.cse7 (<= main_~b~0 main_~y~0)) (.cse8 (= main_~s~0 1)) (.cse9 (<= main_~y~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 (= main_~k~0 0) .cse4 .cse5 (= main_~c~0 main_~a~0) (<= main_~x~0 1) .cse6 .cse7 .cse8 .cse9) (let ((.cse10 (+ main_~b~0 main_~c~0))) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (<= main_~x~0 .cse10) (= main_~k~0 1) (<= .cse10 1) .cse6 .cse7 .cse8 .cse9)))) [2021-05-06 02:32:10,980 INFO L194 CegarLoopUtils]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse0 (= (* main_~y~0 main_~y~0) main_~yy~0)) (.cse1 (= main_~q~0 0)) (.cse2 (<= 1 main_~b~0)) (.cse3 (= main_~r~0 0)) (.cse4 (= main_~p~0 1)) (.cse5 (<= main_~b~0 main_~y~0)) (.cse6 (= main_~s~0 1)) (.cse7 (<= main_~y~0 1))) (or (and .cse0 .cse1 (<= 1 main_~x~0) (= main_~a~0 main_~x~0) (= main_~k~0 0) .cse2 .cse3 (= main_~c~0 main_~a~0) (<= main_~x~0 1) .cse4 .cse5 .cse6 .cse7) (let ((.cse8 (+ main_~b~0 main_~c~0))) (and .cse0 .cse1 .cse2 (<= main_~b~0 main_~x~0) .cse3 (<= main_~a~0 1) (<= main_~x~0 .cse8) (= main_~k~0 1) (<= .cse8 1) (<= 1 main_~a~0) .cse4 .cse5 .cse6 .cse7)))) [2021-05-06 02:32:10,980 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 74) no Hoare annotation was computed. [2021-05-06 02:32:10,980 INFO L198 CegarLoopUtils]: For program point L42(lines 42 43) no Hoare annotation was computed. [2021-05-06 02:32:10,989 INFO L194 CegarLoopUtils]: At program point L71(line 71) the Hoare annotation is: (let ((.cse0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (and (< (* 2 main_~c~0) 1) (<= 1 main_~x~0) (<= main_~a~0 1) (= main_~r~0 1) (<= 0 main_~c~0) (= main_~a~0 .cse0) (<= 1 main_~y~0) (<= 0 main_~b~0) (< (* 2 main_~b~0) 1) (< 0 .cse0) (<= main_~x~0 1) (<= main_~y~0 1))) [2021-05-06 02:32:10,989 INFO L194 CegarLoopUtils]: At program point L38(line 38) the Hoare annotation is: (and (= (* main_~y~0 main_~y~0) main_~yy~0) (<= 1 main_~x~0) (= main_~a~0 main_~x~0) (<= 0 main_~c~0) (<= 1 main_~b~0) (< (* 2 main_~c~0) 1) (= main_~r~0 0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (<= main_~x~0 1) (= main_~p~0 1) (<= main_~b~0 main_~y~0) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-06 02:32:10,990 INFO L194 CegarLoopUtils]: At program point L38-1(line 38) the Hoare annotation is: (and (= (* main_~y~0 main_~y~0) main_~yy~0) (<= 1 main_~x~0) (= main_~a~0 main_~x~0) (<= 0 main_~c~0) (<= 1 main_~b~0) (< (* 2 main_~c~0) 1) (= main_~r~0 0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (<= main_~x~0 1) (= main_~p~0 1) (<= main_~b~0 main_~y~0) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-06 02:32:10,990 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 74) the Hoare annotation is: true [2021-05-06 02:32:10,990 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-06 02:32:10,990 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 1)) [2021-05-06 02:32:10,990 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= 0 main_~y~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2021-05-06 02:32:10,990 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-06 02:32:10,990 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-06 02:32:10,990 INFO L198 CegarLoopUtils]: For program point L51(lines 47 56) no Hoare annotation was computed. [2021-05-06 02:32:10,990 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= (* main_~y~0 main_~y~0) main_~yy~0)) (.cse1 (= main_~q~0 0)) (.cse2 (<= 1 main_~b~0)) (.cse3 (= main_~r~0 0)) (.cse4 (= main_~p~0 1)) (.cse5 (<= main_~b~0 main_~y~0)) (.cse6 (= main_~s~0 1)) (.cse7 (<= main_~y~0 1))) (or (and .cse0 .cse1 (<= 1 main_~x~0) (= main_~a~0 main_~x~0) (= main_~k~0 0) .cse2 .cse3 (= main_~c~0 main_~a~0) (<= main_~x~0 1) .cse4 .cse5 .cse6 .cse7) (let ((.cse8 (+ main_~b~0 main_~c~0))) (and .cse0 .cse1 .cse2 (<= main_~b~0 main_~x~0) .cse3 (<= main_~a~0 1) (<= main_~x~0 .cse8) (= main_~k~0 1) (<= .cse8 1) (<= 1 main_~a~0) .cse4 .cse5 .cse6 .cse7)))) [2021-05-06 02:32:10,991 INFO L194 CegarLoopUtils]: At program point L47-2(lines 47 56) the Hoare annotation is: (let ((.cse0 (= (* main_~y~0 main_~y~0) main_~yy~0)) (.cse1 (= main_~q~0 0)) (.cse2 (<= 1 main_~x~0)) (.cse3 (= main_~a~0 main_~x~0)) (.cse4 (<= 1 main_~b~0)) (.cse5 (= main_~r~0 0)) (.cse6 (= main_~p~0 1)) (.cse7 (<= main_~b~0 main_~y~0)) (.cse8 (= main_~s~0 1)) (.cse9 (<= main_~y~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 (= main_~k~0 0) .cse4 .cse5 (= main_~c~0 main_~a~0) (<= main_~x~0 1) .cse6 .cse7 .cse8 .cse9) (let ((.cse10 (+ main_~b~0 main_~c~0))) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (<= main_~x~0 .cse10) (= main_~k~0 1) (<= .cse10 1) .cse6 .cse7 .cse8 .cse9)))) [2021-05-06 02:32:10,991 INFO L198 CegarLoopUtils]: For program point L47-3(lines 47 56) no Hoare annotation was computed. [2021-05-06 02:32:10,991 INFO L194 CegarLoopUtils]: At program point L41-1(lines 39 68) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 0 main_~c~0)) (.cse3 (< (* 2 main_~c~0) 1)) (.cse4 (<= main_~y~0 1))) (or (let ((.cse2 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (and (< main_~x~0 (* 2 main_~y~0)) .cse0 (= main_~r~0 1) .cse1 (= main_~q~0 1) (< 0 .cse2) .cse3 (<= main_~a~0 1) (= main_~a~0 .cse2) (<= 0 main_~b~0) (< (* 2 main_~b~0) 1) (= (+ main_~s~0 1) 0) .cse4)) (and (= (* main_~y~0 main_~y~0) main_~yy~0) .cse0 (= main_~a~0 main_~x~0) .cse1 (<= 1 main_~b~0) .cse3 (= main_~r~0 0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (<= main_~x~0 1) (= main_~p~0 1) (<= main_~b~0 main_~y~0) (= main_~s~0 1) .cse4))) [2021-05-06 02:32:10,991 INFO L198 CegarLoopUtils]: For program point L72(line 72) no Hoare annotation was computed. [2021-05-06 02:32:10,991 INFO L194 CegarLoopUtils]: At program point L41-2(lines 41 68) the Hoare annotation is: (let ((.cse0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (and (< main_~x~0 (* 2 main_~y~0)) (<= 1 main_~x~0) (= main_~r~0 1) (<= 0 main_~c~0) (= main_~q~0 1) (< 0 .cse0) (< (* 2 main_~c~0) 1) (<= main_~a~0 1) (= main_~a~0 .cse0) (<= 0 main_~b~0) (< (* 2 main_~b~0) 1) (= (+ main_~s~0 1) 0) (<= main_~y~0 1))) [2021-05-06 02:32:10,991 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-06 02:32:10,991 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-06 02:32:10,991 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-06 02:32:10,991 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:32:10,991 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:32:10,991 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-06 02:32:11,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:32:11 BoogieIcfgContainer [2021-05-06 02:32:11,007 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:32:11,008 INFO L168 Benchmark]: Toolchain (without parser) took 12830.16 ms. Allocated memory was 196.1 MB in the beginning and 339.7 MB in the end (delta: 143.7 MB). Free memory was 159.9 MB in the beginning and 319.1 MB in the end (delta: -159.2 MB). Peak memory consumption was 147.7 MB. Max. memory is 8.0 GB. [2021-05-06 02:32:11,008 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 196.1 MB. Free memory is still 176.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:32:11,008 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.66 ms. Allocated memory is still 196.1 MB. Free memory was 159.7 MB in the beginning and 179.3 MB in the end (delta: -19.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB. [2021-05-06 02:32:11,008 INFO L168 Benchmark]: Boogie Preprocessor took 28.32 ms. Allocated memory is still 196.1 MB. Free memory was 179.3 MB in the beginning and 177.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:32:11,008 INFO L168 Benchmark]: RCFGBuilder took 444.32 ms. Allocated memory is still 196.1 MB. Free memory was 177.6 MB in the beginning and 160.4 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:32:11,008 INFO L168 Benchmark]: TraceAbstraction took 12096.47 ms. Allocated memory was 196.1 MB in the beginning and 339.7 MB in the end (delta: 143.7 MB). Free memory was 160.3 MB in the beginning and 319.1 MB in the end (delta: -158.9 MB). Peak memory consumption was 148.9 MB. Max. memory is 8.0 GB. [2021-05-06 02:32:11,008 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 196.1 MB. Free memory is still 176.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 246.66 ms. Allocated memory is still 196.1 MB. Free memory was 159.7 MB in the beginning and 179.3 MB in the end (delta: -19.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.32 ms. Allocated memory is still 196.1 MB. Free memory was 179.3 MB in the beginning and 177.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 444.32 ms. Allocated memory is still 196.1 MB. Free memory was 177.6 MB in the beginning and 160.4 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12096.47 ms. Allocated memory was 196.1 MB in the beginning and 339.7 MB in the end (delta: 143.7 MB). Free memory was 160.3 MB in the beginning and 319.1 MB in the end (delta: -158.9 MB). Peak memory consumption was 148.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9951.5ms, OverallIterations: 12, TraceHistogramMax: 10, EmptinessCheckTime: 22.1ms, AutomataDifference: 2803.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 2052.3ms, InitialAbstractionConstructionTime: 13.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 485 SDtfs, 334 SDslu, 2223 SDs, 0 SdLazy, 1695 SolverSat, 321 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1419.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 812 GetRequests, 678 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1475.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=10, InterpolantAutomatonStates: 114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 164.4ms AutomataMinimizationTime, 12 MinimizatonAttempts, 41 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 20 LocationsWithAnnotation, 69 PreInvPairs, 88 NumberOfFragments, 858 HoareAnnotationTreeSize, 69 FomulaSimplifications, 2326 FormulaSimplificationTreeSizeReduction, 277.3ms HoareSimplificationTime, 20 FomulaSimplificationsInter, 1881 FormulaSimplificationTreeSizeReductionInter, 1761.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 161.6ms SsaConstructionTime, 405.1ms SatisfiabilityAnalysisTime, 3281.8ms InterpolantComputationTime, 801 NumberOfCodeBlocks, 801 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 789 ConstructedInterpolants, 0 QuantifiedInterpolants, 3178 SizeOfPredicates, 51 NumberOfNonLiveVariables, 2412 ConjunctsInSsa, 221 ConjunctsInUnsatCore, 12 InterpolantComputations, 1 PerfectInterpolantSequences, 1207/1400 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: ((((((((((((y * y == yy && q == 0) && 1 <= x) && a == x) && k == 0) && 1 <= b) && r == 0) && c == a) && x <= 1) && p == 1) && b <= y) && s == 1) && y <= 1) || ((((((((((((y * y == yy && q == 0) && 1 <= x) && a == x) && 1 <= b) && r == 0) && x <= b + c) && k == 1) && b + c <= 1) && p == 1) && b <= y) && s == 1) && y <= 1) - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: ((((((((((((x < 2 * y && 1 <= x) && r == 1) && 0 <= c) && q == 1) && 0 < y * r + x * p) && 2 * c < 1) && a <= 1) && a == y * r + x * p) && 0 <= b) && 2 * b < 1) && s + 1 == 0) && y <= 1) || ((((((((((((y * y == yy && 1 <= x) && a == x) && 0 <= c) && 1 <= b) && 2 * c < 1) && r == 0) && b == y * s + x * q) && x <= 1) && p == 1) && b <= y) && s == 1) && y <= 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...